package com.coolweather.android;

import android.app.Fragment;
import android.app.ProgressDialog;
import android.content.Intent;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;

import com.coolweather.android.db.City;
import com.coolweather.android.db.County;
import com.coolweather.android.db.Province;
import com.coolweather.android.until.HttpUtil;
import com.coolweather.android.until.Utility;

import org.litepal.crud.DataSupport;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import okhttp3.Call;
import okhttp3.Callback;
import okhttp3.Response;

/**
 * Created by jinwe on 2017-8-31.
 */

public class ChooseAreaFragment extends Fragment {
    public static final int LEVEL_PROVINCE=0;
    public static final int LEVEL_CITY=1;
    public static final int LEVEL_COUNTY=2;
    private ProgressDialog progressDialog;
    private TextView titleText;
    private Button backButton;
    private ListView listView;
    private ArrayAdapter<String>adapter;
    private List<String>dataList=new ArrayList<>();

    /**
     * 省列表
     */
    private List<Province> provinceList;

    /**
     * 市列表
     */
    private List<City>cityList;

    /**
     * 县列表
     */
    private List<County>countyList;

    /**
     * 选中的省
     */
    private Province selectedProvince;

    /**
     * 选中的市
     */
    private City selectedCity;

    /**
     * 选中的县
     */
    private County selectedCounty;

    /**
     * 当前的选中级别
     */
    private int currentLevel;

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View view=inflater.inflate(R.layout.choose_area,container,false);
        titleText=(TextView)view.findViewById(R.id.title_text);
        backButton=(Button)view.findViewById(R.id.back_button);
        listView=(ListView)view.findViewById(R.id.list_view);
        adapter=new ArrayAdapter<>(getContext(),android.R.layout.simple_list_item_1,dataList);
        listView.setAdapter(adapter);
        return view;
    }

    @Override
    public void onActivityCreated( Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);
        listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
                if (currentLevel==LEVEL_PROVINCE){
                    selectedProvince=provinceList.get(i);
                    queryCities();
                }else if (currentLevel==LEVEL_CITY){
                    selectedCity=cityList.get(i);
                    queryCounties();
                }
            }
        });

        backButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                if (currentLevel==LEVEL_COUNTY){
                    queryCities();
                }else if (currentLevel==LEVEL_CITY){
                    queryProvince();
                }
            }
        });
        queryProvince();
    }

    /**
     * 查询所有的省，先从本地查然后去服务器
     */
    private void queryProvince(){
        titleText.setText("中国");
        backButton.setVisibility(View.GONE);
        provinceList= DataSupport.findAll(Province.class);
        if (provinceList.size()>0){
            dataList.clear();
            for (Province province:provinceList){
                dataList.add(province.getProviceName());
            }
            adapter.notifyDataSetChanged();
            listView.setSelection(0);
            currentLevel=LEVEL_PROVINCE;
        }else {
            String address = "http://guolin.tech/api/china";
            queryFormServer(address,"province");
        }
    }
    /**
     * 查询所有的市，先从本地查然后去服务器
     */
    private void queryCities(){
        titleText.setText(selectedProvince.getProviceName());
        backButton.setVisibility(View.VISIBLE);
        cityList = DataSupport.where("provinceid=?",
                String.valueOf(selectedProvince.getId())).find(City.class);
        if (cityList.size()>0){
            dataList.clear();
            for (City city:cityList){
                dataList.add(city.getCityName());
            }
            adapter.notifyDataSetChanged();
            listView.setSelection(0);
            currentLevel=LEVEL_CITY;
        }else {
            int provinceCode=selectedProvince.getProviceCode();
            String address="http://guolin.tech/api/china/"+provinceCode;
            queryFormServer(address,"city");
        }

    }
    /**
     * 查询所有的县，先从本地查然后去服务器
     */
    private void queryCounties(){
        titleText.setText(selectedCity.getCityName());
        backButton.setVisibility(View.VISIBLE);
        countyList = DataSupport.where("cityid=?",
                String.valueOf(selectedCity.getId())).find(County.class);
        if (countyList.size()>0){
            dataList.clear();
            for (County county:countyList){
                dataList.add(county.getCountyName());
            }
            adapter.notifyDataSetChanged();
            listView.setSelection(0);
            currentLevel=LEVEL_COUNTY;
        }else {
            int provinceCode=selectedProvince.getProviceCode();
            int cityCode=selectedCity.getCityCode();
            String address="http://guolin.tech/api/china/" +provinceCode+"/"+cityCode;
            queryFormServer(address,"county");
        }

    }

    /**
     * 根据传入的地址和类型从服务器上下载数据
     * @param address
     * @param type
     */
    private void queryFormServer(String address,final String type){
        showProgressDialog();
        HttpUtil.sendOkHttpRequest(address, new Callback() {
            @Override
            public void onResponse(Call call, Response response) throws IOException {
                String responText=response.body().string();
                boolean result=false;
                if ("province".equals(type)){
                    result= Utility.handleProvinceResponse(responText);
                }else if ("city".equals(type)){
                    result=Utility.handleCityResponse(responText,selectedProvince.getId());
                }else if ("county".equals(type)){
                    result=Utility.handleCountyResponse(responText,selectedCity.getId());
                }
                if (result){
                    getActivity().runOnUiThread(new Runnable() {
                        @Override
                        public void run() {
                            closeProgressDialog();
                            if ("province".equals(type)){
                                queryProvince();
                            }else if ("city".equals(type)){
                                queryCities();
                            }else if ("county".equals(type)){
                                queryCounties();
                            }

                        }
                    });
                }
            }

            @Override
            public void onFailure(Call call, IOException e) {
                //通过runOnUiThread回到主线程处理逻辑,
                getActivity().runOnUiThread(new Runnable() {
                    @Override
                    public void run() {
                        closeProgressDialog();
                        Toast.makeText(getContext(),"加载失败",Toast.LENGTH_SHORT).show();
                    }
                });
            }
        });
    }

    /**
     * 显示进度对话框
     */
    private void showProgressDialog(){
        if (progressDialog==null){
            progressDialog=new ProgressDialog(getActivity());
            progressDialog.setMessage("真在加载");
            progressDialog.setCanceledOnTouchOutside(false);
        }
        progressDialog.show();

    }
    private void closeProgressDialog(){
        if (progressDialog!=null){
            progressDialog.dismiss();
        }
    }
}
